Scope
ANNEX 1
Factors affecting the choice of frequency bands for
trans-horizon radio-relay systems
1. Introduction
2. Optimum
frequency range of a trans-horizon system
2.1
As a function of received level (considering thermal
noise only)
2.2
As a function of total noise (including thermal and
intermodulation) for analogue systems
2.3
Summary
3. Frequency
sharing with space radiocommunication systems
3.1
Frequency bands shared with space services
(Earth-to-space)
3.2
Frequency bands shared with space services
(space-to-Earth)
3.2.1 Interference from
space stations to trans-horizon systems
3.2.2 Interference from
trans-horizon systems to earth stations
4. Frequency
sharing with line-of-sight radio-relay systems
4.1
Interference from line-of-sight systems to trans-horizon
systems
4.2
Interference from trans-horizon systems to line-of-sight
systems
5. Conclusion